Effect of a Platinum Buffer Layer on the Magnetization Dynamics of Sputter Deposited YIG Polycrystalline Thin Films

Satya Prakash Pati, Muftah Al-Mahdawi, Yohei Shiokawa, Masashi Sahashi, Yasushi Endo

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The present investigation deals with the effect of thickness and a platinum (Pt) buffer layer on the dynamic magnetic properties of polycrystalline yttrium iron garnet (YIG) films fabricated after post-annealing to recrystallize from the amorphous state. The dynamic magnetic properties of films without a buffer layer deteriorate as the thickness decreases as indicated by the increased line-widths in the ferromagnetic resonance spectra. On the other hand, a strong rejuvenation in the static and dynamic magnetic properties of the films is observed when a Pt buffer layer is used. The Pt buffer layer decreases the Gilbert damping parameter from 11.4 x10-4 and 3.5x10-4 for a 100 nm-thick YIG film. These observations mainly originate from controlling the microstructure or the surface morphology of the films.

Original languageEnglish
Article number7906600
JournalIEEE Transactions on Magnetics
Volume53
Issue number11
DOIs
Publication statusPublished - 2017 Nov

Keywords

  • Coplanar waveguide ferromagnetic resonance (CPW-FMR) measurement
  • damping constant
  • thin film
  • yttrium iron garnet (YIG)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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